Polycation
聚阳离子
🗣️ 情景例句
OK. We'll walk back to your office with you.
好吧 ，我们陪你走回你的办公室去。
The builders are already making plans.
建筑家们已经在着手计划了。
Have you got a hat, sir?
先生，您有帽子吗？